<html>
<body>

<form action="/sum" method="post">
数字1:<br>
<input type="text" name="number1" value="5">
<br>
数字2:<br>
<input type="text" name="number2" value="3">
<br><br>
<input type="submit" value="提交">
</form> 
</body>
</html>
